The utility model discloses a position limiting apparatus for CT19 spring operation mechanisms. The apparatus relates to the technical field of mounting a spring operation mechanism inside a switch cabinet. The apparatus comprises a support fixed at the back side of a high voltage switch cabinet, an axial position limiting component, a circumferential position limiting component and two fastening bolt pairs. The circumferential position limiting component and the axial position limiting component are arranged at the inner side and the outer side of the support respectively. The circumferential position limiting component sleeves the axial position limiting component and the upper part and the lower part of the circumferential position limiting component are fixed through the fastening bolt pairs. By mounting a support at the back of a high voltage switch cabinet to correspond with the output shaft of a CT19 spring operation mechanism, the axial position limiting component goes beyond the support and corresponds with the circumferential position limiting component at the other side. Further, the fastening bolt pair has the three elements fixedly combined and the back end of the output shaft of the CT19 spring operation mechanism is sleeved inside the circumferential position limiting component; in this manner, axial position limiting can be achieved to the output shaft of the CT19 spring operation mechanism, ensuring stable operation of the CT19 spring operation mechanism and realizing reliable opening and closing of the switch cabinet.